Spark Plug Recommendation

[CL3406]

Curious what some of you are using for spark plug make & part number? Application is 340 6 pack, 4 spd, 3:73 gears at rear, cross over plugged, 195 stat, stock grind cam. What else do you need to know? Thanks.

 

[brian6pac]

I ran autolite 63, They are copper core and hold up well. My set up was almost the same but bigger cam & 3:91

 

[fatoldguy]

I run E-3-46 , 340 4spd , 456 rear and slightly bigger cam.

 

[grimreaper]

On a very similar combo I ran Autolite 63 and theyworked well.

 

[MOPAROFFICIAL]

NGK 2635

 

[TrailBeast]

Just don't get these on Ebay whatever you do.
Free shipping.

Spark Plug-V-Power NGK 2635 | eBay

 

[mderoy340]

Autolite 3924

 

[71DodgeDemon340]

What heads are you running?

 

[CL3406]

What heads are you running?

Just stock X heads, 69 Block 10.5 to 1.

Thanks everyone for your input!

 

[Marcohotrod]

Compression ratio is what was needed for a proper answer. Aotolite 53 or champion n9yc

 

[71DodgeDemon340]

Just stock X heads, 69 Block 10.5 to 1.

Thanks everyone for your input!

Just curious, the eddy heads wont accept the factory size hex on the plugs.


Ive had good luck with ngk

 

[CL3406]

Just curious, the eddy heads wont accept the factory size hex on the plugs.


Ive had good luck with ngk

Did you use the NGK 2635 like the other A body members mentioned? Thanks

 

[71DodgeDemon340]

I used the NGK BKR5E, but that is for the eddy heads

 

[Marcohotrod]

stock heads can use any 3/4" reach gasketed plug with a 5/8" or 3/4" hex

 

[CL3406]

stock heads can use any 3/4" reach gasketed plug with a 5/8" or 3/4" hex

Yes I am aware of that. Thanks for the info.

 

[abodyjoe]

i'm running autolite 64 in the dart.. pretty much run a 63,64,65 with stock heads. i'd rather have the NGK but the place i was at didn't have them so autolite it was.

 

[Marcohotrod]

I do not have a radio so I run the non resistor plugs.